Damon didn't care that he was following her into a woman's restroom and that people were staring at him. His concern was on the puking girl in front of him. Had the alcohol done this to her? Damnit. He thought he was doing her a favor by getting her booze and he had made her throw up. Smooth fucking move!
Running to the sink, he quickly wet a paper towel before going back to her side and dabbing her forehead with it. "Hey, sweetie...what happened? Are you okay?"